Fixed some Scrutinizer issues.

Author: udan11

src/Parser.php

@@ -436,7 +436,7 @@ public function parse()
                     // `LIMIT` keywords actually belong to the first statement.
                     $lastStatement->order = $statement->order;
                     $lastStatement->limit = $statement->limit;
-                    $statement->order = null;
+                    $statement->order = array();
                     $statement->limit = null;
 
                     // The statement actually ends where the last statement in

src/Utils/Query.php

@@ -536,7 +536,7 @@ public static function getClause($statement, $list, $clause, $type = 0, $skipFir
         // This is a cheap fix for `SELECT` statements that contain `UNION`.
         // Replacing the `ORDER BY` or `LIMIT` clauses should replace the last
         // clause.
-        if (!empty($statement->union)) {
+        if (($statement instanceof SelectStatement) && (!empty($statement->union))) {
             $clauses['ORDER BY'] = count($clauses) + 1;
             $clauses['LIMIT'] = count($clauses) + 2;
         }